---
# Install and configure Grafana Alloy log shipping agent.
# Debian/Ubuntu: Grafana apt repo + alloy package.
# Alpine: musl binary download from GitHub + OpenRC init script.
# FreeBSD: pkgng (grafana-alloy).

# ── Debian/Ubuntu: Grafana apt repo ─────────────────────────────────────────

- name: Create apt keyrings directory (Debian)
  ansible.builtin.file:
    path: /etc/apt/keyrings
    state: directory
    mode: '0755'
  when: ansible_facts["os_family"] == "Debian"

- name: Set architecture fact
  ansible.builtin.set_fact:
    alloy_arch: >-
      {{ ansible_facts['architecture']
         | regex_replace('x86_64', 'amd64')
         | regex_replace('aarch64', 'arm64') }}
  when: ansible_facts["os_family"] in ["Debian", "Alpine"]

- name: Add Grafana GPG key (Debian)
  ansible.builtin.get_url:
    url: https://apt.grafana.com/gpg.key
    dest: /etc/apt/keyrings/grafana.gpg
    mode: '0644'
    force: false
  when: ansible_facts["os_family"] == "Debian"

- name: Add Grafana apt repository (Debian)
  ansible.builtin.apt_repository:
    repo: >-
      deb [arch={{ alloy_arch }} signed-by=/etc/apt/keyrings/grafana.gpg]
      https://apt.grafana.com stable main
    filename: grafana
    state: present
    update_cache: true
  when: ansible_facts["os_family"] == "Debian"

- name: Install alloy (Debian)
  ansible.builtin.apt:
    name: alloy
    state: present
  when: ansible_facts["os_family"] == "Debian"

# ── Alpine: binary download (musl build) ─────────────────────────────────────

- name: Create alloy directories (Alpine)
  ansible.builtin.file:
    path: "{{ item }}"
    state: directory
    mode: '0755'
  loop:
    - /etc/alloy
    - /var/lib/alloy/data
  when: ansible_facts["os_family"] == "Alpine"

- name: Check if alloy binary exists (Alpine)
  ansible.builtin.stat:
    path: /usr/local/bin/alloy
  register: alloy_bin
  when: ansible_facts["os_family"] == "Alpine"

- name: Get installed alloy version (Alpine)
  ansible.builtin.command: /usr/local/bin/alloy --version
  register: alloy_installed_version
  changed_when: false
  failed_when: false
  when:
    - ansible_facts["os_family"] == "Alpine"
    - alloy_bin.stat.exists

- name: Download and install alloy binary (Alpine)
  when:
    - ansible_facts["os_family"] == "Alpine"
    - not alloy_bin.stat.exists or
      alloy_version not in (alloy_installed_version.stdout | default(''))
  block:
    - name: Download alloy musl zip
      ansible.builtin.get_url:
        url: >-
          https://github.com/grafana/alloy/releases/download/v{{ alloy_version
          }}/alloy-linux-{{ alloy_arch }}-musl.zip
        dest: /tmp/alloy.zip
        mode: '0644'

    - name: Extract alloy binary
      ansible.builtin.unarchive:
        src: /tmp/alloy.zip
        dest: /tmp
        remote_src: true

    - name: Install alloy binary
      ansible.builtin.copy:
        src: "/tmp/alloy-linux-{{ alloy_arch }}-musl"
        dest: /usr/local/bin/alloy
        mode: '0755'
        owner: root
        group: root
        remote_src: true
      notify: Restart alloy (Alpine)

    - name: Clean up alloy download
      ansible.builtin.file:
        path: "{{ item }}"
        state: absent
      loop:
        - /tmp/alloy.zip
        - "/tmp/alloy-linux-{{ alloy_arch }}-musl"

- name: Deploy alloy OpenRC init script (Alpine)
  ansible.builtin.template:
    src: alloy_openrc.j2
    dest: /etc/init.d/alloy
    mode: '0755'
  when: ansible_facts["os_family"] == "Alpine"
  notify: Restart alloy (Alpine)

# ── FreeBSD: pkgng ────────────────────────────────────────────────────────────

- name: Install alloy (FreeBSD)
  community.general.pkgng:
    name: alloy
    state: present
  when: ansible_facts["os_family"] == "FreeBSD"

- name: Create alloy directories (FreeBSD)
  ansible.builtin.file:
    path: "{{ item }}"
    state: directory
    mode: '0755'
  loop:
    - /usr/local/etc/alloy
    - /var/db/alloy
  when: ansible_facts["os_family"] == "FreeBSD"

# ── Config — all OS ───────────────────────────────────────────────────────────

- name: Set alloy config path fact
  ansible.builtin.set_fact:
    alloy_config_path: >-
      {{ '/usr/local/etc/alloy/config.alloy'
         if ansible_facts['os_family'] == 'FreeBSD'
         else '/etc/alloy/config.alloy' }}

- name: Deploy alloy config
  ansible.builtin.template:
    src: alloy.config.alloy.j2
    dest: "{{ alloy_config_path }}"
    mode: '0644'
  notify: "Restart alloy ({{ ansible_facts['os_family'] }})"

# ── Service enable + start ────────────────────────────────────────────────────

- name: Enable and start alloy (Debian)
  ansible.builtin.service:
    name: alloy
    state: started
    enabled: true
  when: ansible_facts["os_family"] == "Debian"

- name: Enable and start alloy (Alpine)
  ansible.builtin.service:
    name: alloy
    state: started
    enabled: true
  when: ansible_facts["os_family"] == "Alpine"

- name: Enable alloy (FreeBSD)
  community.general.sysrc:
    name: alloy_enable
    value: "YES"
  when: ansible_facts["os_family"] == "FreeBSD"

- name: Set alloy config in rc.conf (FreeBSD)
  community.general.sysrc:
    name: alloy_config
    value: /usr/local/etc/alloy/config.alloy
  when: ansible_facts["os_family"] == "FreeBSD"

- name: Start alloy (FreeBSD)
  ansible.builtin.service:
    name: alloy
    state: started
  when: ansible_facts["os_family"] == "FreeBSD"